Iodine

The thyroid's mineral — small in amount, exact on the label

All articles checked for accuracy against the GB NHC Register and all sources have citations with verified links to their relevant studies.

Iodine is a tiny trace mineral measured in micrograms, yet it appears widely on ingredient lists. This article explains what iodine is, typical intakes and dietary sources, and how WellsparQ declares it on labels.

This article covers what iodine is, how much people typically need, common food sources, regulatory labelling points and how WellsparQ states iodine amounts across its range. It also explains why the page does not include a benefit claim for products.

Ingredient Snapshot

What it is

A trace mineral needed in microgram amounts for production of certain body hormones.

Where from

Dietary sources such as dairy, fish, eggs, and seaweed (kelp).

Known for

Essential as the elemental component of the hormones made by the neck gland; intake must be balanced.

In WellsparQ

• PhytoPulse200 µg (133% NRV)
• Arctic Kelp & Iodine192 µg (128% NRV)
• Choco Lunch155.4 µg
• Vanilla Lunch150 µg
• BacoPanax Complex45 µg (30% NRV)
• Glucomannan Complex40 µg (26% NRV)
• VitaralDaily36537.5 µg (25% NRV)
• VitaBright Gummies20 µg (13% NRV)

Iodine is a trace mineral the body needs in tiny amounts — micrograms, not milligrams — but cannot do without. Its single indispensable job is as a raw material for the thyroid hormones, which the thyroid gland cannot make without it. Because the body holds no large store and the amount needed is small but non-negotiable, iodine is one of the minerals where both too little and too much matter. This page sets out what iodine is, how much is needed and from where, and how WellsparQ declares it across the range — as plain nutrition science, with the reason for the page's restraint at the end.

Why the body needs it

Iodine's role is specific and well established. The thyroid gland takes up iodine from the blood and uses it to build the hormones thyroxine (T4) and triiodothyronine (T3) — the "3" and "4" refer to the number of iodine atoms each carries ^¹². Those hormones regulate metabolism throughout the body and are essential to normal growth and brain development, which is why adequate iodine matters especially in pregnancy and early life ^¹². This is neutral physiology — the description you would find in any nutrition text or government fact sheet — and on this page it stays background science, not a product benefit.

How much, and from where

Iodine requirements are measured in micrograms. UK guidance sets an adult requirement of around 140 µg a day, and most people can meet it from a varied diet ^¹. The EU nutrient reference value (NRV) used for labelling is 150 µg, and international bodies advise higher intakes in pregnancy and breastfeeding ^²³. The main dietary sources are dairy, fish and shellfish, eggs, and — variably — seaweed ^¹².

Two practical points are worth stating. First, plant-based and dairy-free diets can be lower in iodine, because dairy is a major UK source; this is one reason iodine appears in supplements aimed at those diets ^¹. Second, seaweed and kelp are naturally rich but highly variable sources — some contain very large, unpredictable amounts — which is why iodine from seaweed needs to be measured and declared rather than assumed ^²⁴.

There is a clear upper end. Both too little and too much iodine can disturb thyroid function, and authorities set tolerable upper intake levels for that reason — EFSA's is 600 µg a day for adults from all sources ^³⁴. Sustained high intakes, often from concentrated seaweed products, are the usual route to excess.

How WellsparQ declares it

Iodine runs through much of the WellsparQ range, always stated to the microgram — and, where it comes from seaweed, described as such rather than dressed up.

Source: WellsparQ Supplements Database. The honesty note WellsparQ makes about Arctic Kelp & Iodine is a good example of the house standard: the iodine "arrives already in the seaweed, and we state the figure" rather than pretending to a precision the raw material does not have. Most formulas are plant-based and suitable for vegetarians and vegans.

Why this page carries no benefit line

Iodine is an authorised mineral: unlike a botanical, it does have permitted health claims in the retained EU Register — for example the well-known wordings that iodine contributes to normal thyroid function, to normal cognitive function, and to normal energy-yielding metabolism, all assessed by EFSA ^³. In principle an iodine product meeting the dose condition can carry one of those authorised lines.

The catch is procedural but strict. A health claim may be used only in its exact authorised wording, and for this batch no iodine claim text was supplied in the claims dataset. Rather than paraphrase or reconstruct the permitted wording from memory — either of which risks a non-compliant label — this page states none. The physiology above is background science, not a benefit of any named product. When the exact authorised wording is provided, a compliant benefit line can be added to any SKU that meets the dosing condition; until then, the honest course is to defer.